I will be changing the front and rear differential oil on my 2018
zforce trail this weekend.I'm going to use synthetic.Will i need more than a quart to do this?
Thanks,,,,,,,,,Bob

[2015 Z Force 800 53/Trail EPS]

Because CFM doesn't use the bottom of the fill port as the full mark you have to measure and use what the book says so...just add the two up.

If i remember right it does not say fill to spill.I did see some where on the forum that it said to fill to the bottom of the filler hole.But i might be wrong and probly am.
If by chance you know the measurements for each i sure do need them.All i have is the book that is provided and i have the buggy stored for the winter.
Thank you............Bob

From the 2018 Owners Manual:
Front and rear gear case
The front and rear gear case must be checked for oil leaks before operating. If any leaks are found,
have your dealer check and repair the vehicle.
Front gear case oil check
1. Place the vehicle on a level surface.
2. Remove the oil filler bolt ① and check the oil
level. The level should be up to the brim of the
hole. If the level is low, add sufficient oil to raise
it to the specified level.

Front & Rear differential oil: SAE80W/90 GL-4
Rear Capacity 8.4 oz. (250ml)
Front differential Capacity 9.5 oz.  (280ml)
Note: the above is from the maintenance section the spec section says:
Rear differential oil:
Type:  SAE80W/90 GL-4
Capacity: 8.4 oz. (250ml), 10.1 oz. (300ml)
Front differential oil:
Type:SAE80W/90 GL-4
9.4 oz. (280ml), 11.1 oz. (330ml)
Note: also do not know why they list two different figures.

[2015 Z Force 800 53/Trail EPS]

Looks like they changed things on the 18+s. Good to know. Good question on why he two different amounts.

Smitty thank you very much for the post. Filling them up to the brim of the filler holes is alot easier than measuring ounces.
I will jot this down in my book i keep repair information in.
Plus i get to save money on the diff lube.